Ball-bearing pivoted and balanced device.



L. BADGER.

BALL BEARING PIVOTBD AND BALANGED DEVICE.

APPLIUATIUN HLED MAILS. 1911,

1,023,609. Pamea Apr. 16, 1912.

2f" 20' 55 ff@ 59 9 fr# outline and'havmg a 4 portions 5, 6,)7, forme therein, on which a =will be understood that these stepped portions extend around the bed plate and that y the number of steps mafy The outer portion 11 o UNITED STATES PATENT OFFICE.

LUTHER BADGER, OF ST. JOHNS, OREGON.

BALL-BEARIN G PIVOTED AND BALANCD DEVICE.

Speclcation of Letters Patent.

p Patented Apr. 16,1912.

Application med March a, 1911. seriai No. 611,993.

To all whom; it may concern.'

Be it known that I, LUTHER BADGER, a citizen ofthe United. States, and a resident of St. Johns, in the county of Multnomah and State of Oregon, have invented a new and Improved Ball-Bearing Pivoted and Balanced Device, of which Vthe following is a full, clear, and exact description.

My invention relates generally to a pivoted and balanced construction embodying the use of ball bearings as set forth in my co-pending application No. 529,529.

More particularly my invention comprises a construct-ion adapted to structures which are rotatably pivoted, and such as are generally found in draw-bridges, turn-tables, or hoisting cranes.

The object of-my invention is to provide an eilicient construction whereby friction may be materially lessened and the operation of the parts rendered more eiicieut.

-Reference is to be' had to the accompanying drawings forming a part of this specification, in which like characters of reference 'denote corresponding parts in all the views, and in Which- Figure 1' is a partly sectional view of a rotatable structure embodying my invention,

taken on the line 1-1 of Fig 2. Fig. 2 is a horizontal sectional view ta en on the line 2 2 of Fig. 1.

Asuitable foundation structure 1, preferably circular in,v outline, and having the central portion thereof recessed as at 2, is provide at its center withl a bed plate 3 rigidly secured thereto by means of suitable bolts 4, the bed plate being also circular in lurality of stepped plurality of alls 8, are adapted to rest; it

be varied at will. the circular foundation 1' is provided at its upper surface with the annular ring 12 secured-to the foundation by suitable bolts 13, 14,V this annular ring being also provided with. aseries of steps on 4which a plurality of balls 15 16, are adapted to rest. v

The rotatable member is designated as 17 and this member is also substantially circular' in outline and of -suiiicient thickness for the use to which it is to be put. On its under face 1and at its centralportion, it is provided with a cap member 18 suitably secured 1n place by means of bolts 19; this member is also provided with a series -of steps'20, 21, which lie in the same vertical.

planes as the steps 6, 7, on the bed plate 3 and these steps are adapted to rest on the balls carried on these steps; the bed plate and the ca .member are cooperating elef ments and t e bedplate may be said'to be of convex formation and the cap member of concave formation. Adjacent its outer edge, the rotatable member, or table 17, is provided with a cap member 25 also of circular formation, secured to the said table by suitable bolts 26, this cap member being provided wit-h a series of -steps equal in number to the steps on the cooperating annular ring or bed plate 12; from Fig. 1 it will be noted that the steps on the `member 25 are in engagement with the balls carried on the steps of the member 12, this construction being an. enlarged modification of the pivot structure shown at the center. It will be observed that all bearing contact is made through the inter-position of balls which are freely rotatable alon the various ste s as the member 1'( is turne and that there 1s no contact save this rolling one,

member 1T with respect to the foundation 1 may be elfect'ed Wholly through the outer with, if desired, and the turning of the circular or annular ball bearing members.

It isalso to be particularly noted that the height of4 each of the steps shown isless than the diameter of the Vballs resting on these steps, and, furthermore, that the width of thesteps is substantially greater than the diameter of these balls so that all pressure or-weight from the moving-member to the stationary one is transmitted through the balls and not through any fixed part. It is also to be noted that by making the bed plate 3 of stepped formation, whereby a structure somewhat frusto-conical is obtained, that the position of the cap 18 thereon is fixed and thatthere is no danger of these members becoming displaced relal without departing from the spirit ofthe alp-- on the use to which the construction is put,

l outline, a bed plate of intevral construction .glo

at a central portiong'the said bed plate being provided with a plurality of circular concentric steps, Athe outer portion of the-said foundation member bein provided with an 'annular 'ring of integra construction, the

ring havingconcentric steps, together with a`ro'tatab1e member having a concave 'cap at the central portion provided with circular concentric steps in its concave surface, and A Athe concaved member Where 'y a substantially frictionlessrotatable balls in engagement with the saidAV steps and the steps on the said bed plate, the outer portion of the said rotatable member being provided with a vcircular member of concave'construction having a plurality of circular concentric steps on the concave portion, together with balls restin between the said steps ofthe said ring an the steps on Ortionof the said circular balanced construction is produced.

In testimony whereof I have signed my name to this specifica-tion in the presence of two subscribing witnesses.

LUTHER BADGER. Witnesses:

FRANK N. SnNnIrUn, EUGENE S; WRIGHT. 

